public List <object> ReadConstructedType(int length)
{
var values = new List <object>();
long endPosition = Position + length;
while (Position < endPosition)
{
Asn1Type type = ReadType();
if (type.Byte == 0)
{
break;
}
length = ReadLength();
if (type.IsPrimitive)
{
values.Add(ReadPrimiveType(type, length));
}
else
{
values.Add(ReadConstructedType(length));
}
}
return(values);
}
public string ReadOctetString()
{
Asn1Type type = ReadType();
if (!type.IsPrimitive && type.Tag == Asn1Tag.OctetString)
{
throw new Exception("Expected OctetString");
}
int length = ReadLength();
return(ReadOctetString(length));
}
public int ReadInteger()
{
Asn1Type type = ReadType();
if (!type.IsPrimitive && type.Tag == Asn1Tag.Integer)
{
throw new Exception("Expected integer");
}
int length = ReadLength();
return(ReadInteger(length));
}
public object ReadPrimiveType(Asn1Type type, int length)
{
switch (type.Tag)
{
case Asn1Tag.Null:
return(null);
case Asn1Tag.Integer:
return(ReadInteger(length));
case Asn1Tag.OctetString:
return(ReadOctetString(length));
case Asn1Tag.ObjectIdentifier:
return(ReadOID(length));
default:
Skip(length);
return("NYI: " + type.Tag);
}
}
public object ReadPrimiveType(Asn1Type type, int length)
{
switch (type.Tag)
{
case Asn1Tag.Null:
return null;
case Asn1Tag.Integer:
return ReadInteger(length);
case Asn1Tag.OctetString:
return ReadOctetString(length);
case Asn1Tag.ObjectIdentifier:
return ReadOID(length);
default:
Skip(length);
return "NYI: " + type.Tag;
}
}
